//! A module with ide helpers for high-level ide features.
+pub mod famous_defs;
+pub mod generated_lints;
pub mod import_assets;
pub mod insert_use;
pub mod merge_imports;
+pub mod insert_whitespace_into_node;
+pub mod node_ext;
pub mod rust_doc;
-pub mod generated_lints;
+pub mod format_string;
use std::collections::VecDeque;
use base_db::FileId;
-use either::Either;
-use hir::{Crate, Enum, ItemInNs, MacroDef, Module, ModuleDef, Name, ScopeDef, Semantics, Trait};
+use hir::{ItemInNs, MacroDef, ModuleDef, Name, Semantics};
+use itertools::Itertools;
use syntax::{
- ast::{self, make},
- SyntaxKind, SyntaxToken, TokenAtOffset,
+ ast::{self, make, HasLoopBody},
+ AstNode, AstToken, Preorder, RustLanguage, SyntaxKind, SyntaxToken, TokenAtOffset, WalkEvent,
+ T,
};
-use crate::RootDatabase;
+use crate::{defs::Definition, RootDatabase};
+
+pub use self::famous_defs::FamousDefs;
pub fn item_name(db: &RootDatabase, item: ItemInNs) -> Option<Name> {
match item {
) -> Option<SyntaxToken> {
tokens.max_by_key(move |t| f(t.kind()))
}
+pub fn pick_token<T: AstToken>(mut tokens: TokenAtOffset<SyntaxToken>) -> Option<T> {
+ tokens.find_map(T::cast)
+}
/// Converts the mod path struct into its ast representation.
pub fn mod_path_to_ast(path: &hir::ModPath) -> ast::Path {
segments.extend(
path.segments()
.iter()
- .map(|segment| make::path_segment(make::name_ref(&segment.to_string()))),
+ .map(|segment| make::path_segment(make::name_ref(&segment.to_smol_str()))),
);
make::path_from_segments(segments, is_abs)
}
pub fn visit_file_defs(
sema: &Semantics<RootDatabase>,
file_id: FileId,
- cb: &mut dyn FnMut(Either<hir::ModuleDef, hir::Impl>),
+ cb: &mut dyn FnMut(Definition),
) {
let db = sema.db;
let module = match sema.to_module_def(file_id) {
if let ModuleDef::Module(submodule) = def {
if let hir::ModuleSource::Module(_) = submodule.definition_source(db).value {
defs.extend(submodule.declarations(db));
- submodule.impl_defs(db).into_iter().for_each(|impl_| cb(Either::Right(impl_)));
+ submodule.impl_defs(db).into_iter().for_each(|impl_| cb(impl_.into()));
}
}
- cb(Either::Left(def));
- }
- module.impl_defs(db).into_iter().for_each(|impl_| cb(Either::Right(impl_)));
-}
-
-/// Helps with finding well-know things inside the standard library. This is
-/// somewhat similar to the known paths infra inside hir, but it different; We
-/// want to make sure that IDE specific paths don't become interesting inside
-/// the compiler itself as well.
-///
-/// Note that, by default, rust-analyzer tests **do not** include core or std
-/// libraries. If you are writing tests for functionality using [`FamousDefs`],
-/// you'd want to include [minicore](test_utils::MiniCore) declaration at the
-/// start of your tests:
-///
-/// ```
-/// //- minicore: iterator, ord, derive
-/// ```
-pub struct FamousDefs<'a, 'b>(pub &'a Semantics<'b, RootDatabase>, pub Option<Crate>);
-
-#[allow(non_snake_case)]
-impl FamousDefs<'_, '_> {
- pub fn std(&self) -> Option<Crate> {
- self.find_crate("std")
- }
-
- pub fn core(&self) -> Option<Crate> {
- self.find_crate("core")
+ cb(def.into());
}
+ module.impl_defs(db).into_iter().for_each(|impl_| cb(impl_.into()));
+}
- pub fn core_cmp_Ord(&self) -> Option<Trait> {
- self.find_trait("core:cmp:Ord")
- }
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+pub struct SnippetCap {
+ _private: (),
+}
- pub fn core_convert_From(&self) -> Option<Trait> {
- self.find_trait("core:convert:From")
+impl SnippetCap {
+ pub const fn new(allow_snippets: bool) -> Option<SnippetCap> {
+ if allow_snippets {
+ Some(SnippetCap { _private: () })
+ } else {
+ None
+ }
}
+}
- pub fn core_convert_Into(&self) -> Option<Trait> {
- self.find_trait("core:convert:Into")
- }
+/// Calls `cb` on each expression inside `expr` that is at "tail position".
+/// Does not walk into `break` or `return` expressions.
+/// Note that modifying the tree while iterating it will cause undefined iteration which might
+/// potentially results in an out of bounds panic.
+pub fn for_each_tail_expr(expr: &ast::Expr, cb: &mut dyn FnMut(&ast::Expr)) {
+ match expr {
+ ast::Expr::BlockExpr(b) => {
+ match b.modifier() {
+ Some(
+ ast::BlockModifier::Async(_)
+ | ast::BlockModifier::Try(_)
+ | ast::BlockModifier::Const(_),
+ ) => return cb(expr),
- pub fn core_option_Option(&self) -> Option<Enum> {
- self.find_enum("core:option:Option")
+ Some(ast::BlockModifier::Label(label)) => {
+ for_each_break_expr(Some(label), b.stmt_list(), &mut |b| {
+ cb(&ast::Expr::BreakExpr(b))
+ });
+ }
+ Some(ast::BlockModifier::Unsafe(_)) => (),
+ None => (),
+ }
+ if let Some(stmt_list) = b.stmt_list() {
+ if let Some(e) = stmt_list.tail_expr() {
+ for_each_tail_expr(&e, cb);
+ }
+ }
+ }
+ ast::Expr::IfExpr(if_) => {
+ let mut if_ = if_.clone();
+ loop {
+ if let Some(block) = if_.then_branch() {
+ for_each_tail_expr(&ast::Expr::BlockExpr(block), cb);
+ }
+ match if_.else_branch() {
+ Some(ast::ElseBranch::IfExpr(it)) => if_ = it,
+ Some(ast::ElseBranch::Block(block)) => {
+ for_each_tail_expr(&ast::Expr::BlockExpr(block), cb);
+ break;
+ }
+ None => break,
+ }
+ }
+ }
+ ast::Expr::LoopExpr(l) => {
+ for_each_break_expr(l.label(), l.loop_body().and_then(|it| it.stmt_list()), &mut |b| {
+ cb(&ast::Expr::BreakExpr(b))
+ })
+ }
+ ast::Expr::MatchExpr(m) => {
+ if let Some(arms) = m.match_arm_list() {
+ arms.arms().filter_map(|arm| arm.expr()).for_each(|e| for_each_tail_expr(&e, cb));
+ }
+ }
+ ast::Expr::ArrayExpr(_)
+ | ast::Expr::AwaitExpr(_)
+ | ast::Expr::BinExpr(_)
+ | ast::Expr::BoxExpr(_)
+ | ast::Expr::BreakExpr(_)
+ | ast::Expr::CallExpr(_)
+ | ast::Expr::CastExpr(_)
+ | ast::Expr::ClosureExpr(_)
+ | ast::Expr::ContinueExpr(_)
+ | ast::Expr::FieldExpr(_)
+ | ast::Expr::ForExpr(_)
+ | ast::Expr::IndexExpr(_)
+ | ast::Expr::Literal(_)
+ | ast::Expr::MacroCall(_)
+ | ast::Expr::MacroStmts(_)
+ | ast::Expr::MethodCallExpr(_)
+ | ast::Expr::ParenExpr(_)
+ | ast::Expr::PathExpr(_)
+ | ast::Expr::PrefixExpr(_)
+ | ast::Expr::RangeExpr(_)
+ | ast::Expr::RecordExpr(_)
+ | ast::Expr::RefExpr(_)
+ | ast::Expr::ReturnExpr(_)
+ | ast::Expr::TryExpr(_)
+ | ast::Expr::TupleExpr(_)
+ | ast::Expr::WhileExpr(_)
+ | ast::Expr::LetExpr(_)
+ | ast::Expr::YieldExpr(_) => cb(expr),
}
+}
- pub fn core_default_Default(&self) -> Option<Trait> {
- self.find_trait("core:default:Default")
+pub fn for_each_break_and_continue_expr(
+ label: Option<ast::Label>,
+ body: Option<ast::StmtList>,
+ cb: &mut dyn FnMut(ast::Expr),
+) {
+ let label = label.and_then(|lbl| lbl.lifetime());
+ if let Some(b) = body {
+ let tree_depth_iterator = TreeWithDepthIterator::new(b);
+ for (expr, depth) in tree_depth_iterator {
+ match expr {
+ ast::Expr::BreakExpr(b)
+ if (depth == 0 && b.lifetime().is_none())
+ || eq_label_lt(&label, &b.lifetime()) =>
+ {
+ cb(ast::Expr::BreakExpr(b));
+ }
+ ast::Expr::ContinueExpr(c)
+ if (depth == 0 && c.lifetime().is_none())
+ || eq_label_lt(&label, &c.lifetime()) =>
+ {
+ cb(ast::Expr::ContinueExpr(c));
+ }
+ _ => (),
+ }
+ }
}
+}
- pub fn core_iter_Iterator(&self) -> Option<Trait> {
- self.find_trait("core:iter:traits:iterator:Iterator")
+fn for_each_break_expr(
+ label: Option<ast::Label>,
+ body: Option<ast::StmtList>,
+ cb: &mut dyn FnMut(ast::BreakExpr),
+) {
+ let label = label.and_then(|lbl| lbl.lifetime());
+ if let Some(b) = body {
+ let tree_depth_iterator = TreeWithDepthIterator::new(b);
+ for (expr, depth) in tree_depth_iterator {
+ match expr {
+ ast::Expr::BreakExpr(b)
+ if (depth == 0 && b.lifetime().is_none())
+ || eq_label_lt(&label, &b.lifetime()) =>
+ {
+ cb(b);
+ }
+ _ => (),
+ }
+ }
}
+}
- pub fn core_iter(&self) -> Option<Module> {
- self.find_module("core:iter")
- }
+fn eq_label_lt(lt1: &Option<ast::Lifetime>, lt2: &Option<ast::Lifetime>) -> bool {
+ lt1.as_ref().zip(lt2.as_ref()).map_or(false, |(lt, lbl)| lt.text() == lbl.text())
+}
- pub fn core_ops_Deref(&self) -> Option<Trait> {
- self.find_trait("core:ops:Deref")
- }
+struct TreeWithDepthIterator {
+ preorder: Preorder<RustLanguage>,
+ depth: i32,
+}
- fn find_trait(&self, path: &str) -> Option<Trait> {
- match self.find_def(path)? {
- hir::ScopeDef::ModuleDef(hir::ModuleDef::Trait(it)) => Some(it),
- _ => None,
- }
+impl TreeWithDepthIterator {
+ fn new(body: ast::StmtList) -> Self {
+ let preorder = body.syntax().preorder();
+ Self { preorder, depth: 0 }
}
+}
- fn find_enum(&self, path: &str) -> Option<Enum> {
- match self.find_def(path)? {
- hir::ScopeDef::ModuleDef(hir::ModuleDef::Adt(hir::Adt::Enum(it))) => Some(it),
- _ => None,
- }
- }
+impl<'a> Iterator for TreeWithDepthIterator {
+ type Item = (ast::Expr, i32);
- fn find_module(&self, path: &str) -> Option<Module> {
- match self.find_def(path)? {
- hir::ScopeDef::ModuleDef(hir::ModuleDef::Module(it)) => Some(it),
- _ => None,
+ fn next(&mut self) -> Option<Self::Item> {
+ while let Some((event, expr)) = self.preorder.find_map(|ev| match ev {
+ WalkEvent::Enter(it) => Some(WalkEvent::Enter(())).zip(ast::Expr::cast(it)),
+ WalkEvent::Leave(it) => Some(WalkEvent::Leave(())).zip(ast::Expr::cast(it)),
+ }) {
+ match (event, expr) {
+ (
+ WalkEvent::Enter(_),
+ ast::Expr::LoopExpr(_) | ast::Expr::WhileExpr(_) | ast::Expr::ForExpr(_),
+ ) => {
+ self.depth += 1;
+ }
+ (
+ WalkEvent::Leave(_),
+ ast::Expr::LoopExpr(_) | ast::Expr::WhileExpr(_) | ast::Expr::ForExpr(_),
+ ) => {
+ self.depth -= 1;
+ }
+ (WalkEvent::Enter(_), ast::Expr::BlockExpr(e)) if e.label().is_some() => {
+ self.depth += 1;
+ }
+ (WalkEvent::Leave(_), ast::Expr::BlockExpr(e)) if e.label().is_some() => {
+ self.depth -= 1;
+ }
+ (WalkEvent::Enter(_), expr) => return Some((expr, self.depth)),
+ _ => (),
+ }
}
+ None
}
+}
- fn find_crate(&self, name: &str) -> Option<Crate> {
- let krate = self.1?;
- let db = self.0.db;
- let res =
- krate.dependencies(db).into_iter().find(|dep| dep.name.to_string() == name)?.krate;
- Some(res)
+/// Checks if the given lint is equal or is contained by the other lint which may or may not be a group.
+pub fn lint_eq_or_in_group(lint: &str, lint_is: &str) -> bool {
+ if lint == lint_is {
+ return true;
}
- fn find_def(&self, path: &str) -> Option<ScopeDef> {
- let db = self.0.db;
- let mut path = path.split(':');
- let trait_ = path.next_back()?;
- let std_crate = path.next()?;
- let std_crate = self.find_crate(std_crate)?;
- let mut module = std_crate.root_module(db);
- for segment in path {
- module = module.children(db).find_map(|child| {
- let name = child.name(db)?;
- if name.to_string() == segment {
- Some(child)
- } else {
- None
- }
- })?;
- }
- let def =
- module.scope(db, None).into_iter().find(|(name, _def)| name.to_string() == trait_)?.1;
- Some(def)
+ if let Some(group) = generated_lints::DEFAULT_LINT_GROUPS
+ .iter()
+ .chain(generated_lints::CLIPPY_LINT_GROUPS.iter())
+ .chain(generated_lints::RUSTDOC_LINT_GROUPS.iter())
+ .find(|&check| check.lint.label == lint_is)
+ {
+ group.children.contains(&lint)
+ } else {
+ false
}
}
-#[derive(Clone, Copy, Debug, PartialEq, Eq)]
-pub struct SnippetCap {
- _private: (),
-}
-
-impl SnippetCap {
- pub const fn new(allow_snippets: bool) -> Option<SnippetCap> {
- if allow_snippets {
- Some(SnippetCap { _private: () })
- } else {
- None
- }
- }
+/// Parses the input token tree as comma separated plain paths.
+pub fn parse_tt_as_comma_sep_paths(input: ast::TokenTree) -> Option<Vec<ast::Path>> {
+ let r_paren = input.r_paren_token();
+ let tokens =
+ input.syntax().children_with_tokens().skip(1).map_while(|it| match it.into_token() {
+ // seeing a keyword means the attribute is unclosed so stop parsing here
+ Some(tok) if tok.kind().is_keyword() => None,
+ // don't include the right token tree parenthesis if it exists
+ tok @ Some(_) if tok == r_paren => None,
+ // only nodes that we can find are other TokenTrees, those are unexpected in this parse though
+ None => None,
+ Some(tok) => Some(tok),
+ });
+ let input_expressions = tokens.into_iter().group_by(|tok| tok.kind() == T![,]);
+ let paths = input_expressions
+ .into_iter()
+ .filter_map(|(is_sep, group)| (!is_sep).then(|| group))
+ .filter_map(|mut tokens| {
+ syntax::hacks::parse_expr_from_str(&tokens.join("")).and_then(|expr| match expr {
+ ast::Expr::PathExpr(it) => it.path(),
+ _ => None,
+ })
+ })
+ .collect();
+ Some(paths)
}
projects / rust.git / blobdiff